Calculating machine



Nov. 2, 1943. R. E. BOYDEN ET AL 7 2,333,234

CALCULATING MACHINE Filed May 16, 1941 3 Sheets-Sheet 1 INVENTORS. Robe/2" f. Boyden Harald I Avery A TTORNEYS.

Nov. 2, I943. R. E. BOYDEN ETAL 2,333,234

CALCULATING MACHINE Filed May 16, 1941 3 Sheets-Sheet 2 /0g7 INVENTORS. W 45 Robert E. 501 22/ B) Harald 7f Avery A TTORNEYS 1943. R. E. BOYDEN EI'AL 2,333,234

CALCULATING MACHINE Filed May 16, 1941 3 Sheets-Sheet 5 r I VEN TORS. Faber-l f. Bayden.

BY Harald 7'. Are/y.

FIE-3.1 D-

ATTORNEYS.

Patented Nov, 2, 1943 CALCULATING MACHINE.

Robert E. Boyden, Kensington Park, and Harold T. Avery, Oakland, Calif., assignors to Marchant Calculating Machine Company, a corporation of California Application May 16, 1941, Serial no. 393,728 21 Claims. (01. 235-62) The present invention relates to motor driven calculating machines and particularly to machines of the general type disclosed in Avery Patent Number 2,216,659 dated October first, 1940, to which reference may be had for a disclosure of structural details not specifically described herein. Machines of the general type disclosed in the aforesaid patent are in use commercially, being sold under the trade-mark Marchant.

Such machines comprise a plurality of separate clutches each of which operates certain mechanism provided for a different special purpose. Among these is the setting clutch which, inter alia, actuates the value selecting devices, effects engagement of the accumulator with the actuating mechanism, and initiates operation of the actuating mechanism. A restore clutch is also provided for the purpose of controlling or performing various functions including the release of the accumulator from engagement with the actuating mechanism and other normalizing ad- J'ustments. The controls of these clutches are interrelated so as to facilitate automatic operation of the machine in various computations, particularly in the performance of division problems.

The primary object of the present invention is to simplify the. construction of machines of the general type disclosed in the aforesaid patent.

A further and more specific object of the invention is to provide a single clutch controlled mechanism for controlling or performing the functions heretofore controlled or performed by a plurality of clutch controlled mechanisms in such machines.

A further specific object of the invention is to revise and simplify the control mechanisms of machines of the class described.

The manner in which the foregoing, together with other, objects and advantages of the invention are attained will be apparent from the following description of a specific embodiment thereof, reference being had to the accompanying drawings, in which:

Figure 1 is a right side view of one of the control keys illustrating the connection thereof with the program clutch.

Figure 2 is a right side view of the mechanism controlled by the program clutch forautomatically initiating operation of the actuator clutch.

Figure 3 is a right side view of one of the cams driven. by the program clutch and certain devices controlled thereby.

Figure 3A is a right side view of part of the dividend sensing mechanism and one order of the mechanism for comparing the dividend with the divisor.

Figure 4 is a fragmentary view from the right, showing the actuator clutch dog, the latch for holding said dog in its effective position, and the means for unlatching said dog.

Figure 5 is a right side view of the division operating lever and the means for releasing and recocking the same.

Figure 6 shows the cam for enmeshing the actuator selection gears, as determined by the set up keys depressed.

Figure 7 shows the cam for locking the actuator gears in their selected position.

Figure 8 shows the cam for automatically reversing the direction of rotation ofthe actuator.

Figure 9 shows the cam which enmeshes the register drive gear with the actuators.

Figure 10 shows the cam which unlocks and locks the actuators prior and subsequent to the actuating cycle.

As described in the aforesaid patent, machines of the general type to which the present invention relates have heretofore employed a setting clutch and mechanism driven thereby to effect various operations incident to the commencement of a calculation under the power of the motor, and have also employed a restore clutch to eiiect various operations incident to the termination of such a calculation, as well as certain special functions in connection with multiplication and division calculations.

The present invention contemplates the provision of a single program clutch having an operating cycle consisting of a plurality of phases, each phase being employed to effect the operations previously performed by one of theseparate clutches heretofore employed.

The internal construction of the program clutch I5 (Figure 1) corresponds to that of the setting clutch described in detail in the afore said patent. The control dog In journaled on shaft l normally is held by spring 522 in one or the other of the diametrically opposite notches H and 18 to maintain the clutch disengaged;

but upon rocking of the dog Hi to .remove the same from either of said notches the clutch will be engaged and will drive the shaft 20 through a half rotation. During the first half rotation of shaft 20 the functions previously performed by the setting clutch mechanism of the aforesaid patent; are performed, and this is therefore referred to herein as the setting phase of operation of the program clutch l5. During the second half rotation of shaft 20 the functions previously performed by the restore clutch mechanism of the aforesaid patent are performed, and this is therefore referred to herein as the restore phase of operation of the program clutch 15.

Initiation of the setting phase of operation of the program clutch. is effected by means corresponding to those employed in the aforesaid patent for initiating operation of the setting clutch disclosed therein. To permit rocking of the clutch control dog (Figure 1) by any of the control mechanisms described in said patent, an operatingbar 503 is provided, which is adapted to be directly or indirectly actuated by any of said mechanisms.

Bar 503 is supported on a frame plate of the machine by levers 504 and 505 pivoted to said plate at 506 and50l, respectively, and to the bar at 508 and 509, respectively. Spring 510 tensioned between the lower end of lever 504 and the machine frame normally holds bar 503 in its raised position.

So that lowering of the bar 503 may rock the clutch control dog 10, a bell crank 514 is pivotally mounted on the lever 505 at 513 and notched adjacent its lower end to engage a lateral extension 515 on dog 10 when the bell crank is in the position in which it is normally held by a spring 516 tensioned between the other arm of the bell crank and bar 503. An arrangement such as is described in the aforesaid patent is employed to rock bell crank 514 against the tension of spring 516 and disengage it from the lateral extension 515 of clutch control dog 10 after initiation of the setting phase has been effected, thus permitting spring 522 to effect disengagement of the program clutch at. the conclusion of the setting phase of its operation.

The program clutch during its setting phase of operation,'operates the power set value selection and locking system, effects the engagement of the accumulator with the actuating mechanism by dipping the carriage and also efiects engagement of the main clutch to initiate operation of the actuating mechanism. These operations are accomplished by cams mounted on the shaft 20 which is driven through the program clutch said cams corresponding in their functions to those described in detail in the aforesaid patent but being modified as hereinafter described.

The complementary cams 45 and 45 (Figure 6) correspond functionally to the complementary cams 220 and 221 of the aforesaid patent, being employed to actuate the selection sensing system shown in said patent through a cam follower plate 224 pivotally mounted on shaft 225. Only half of these cams is contoured to effect actuation of the selection sensing system in the machine embodying the present invention, however, a dwell being employed to avoid useless actuation of the sensing mechanism during the restore phase of the program clutch.

The complementary cams 4'1 and 48 (Figure 7) correspond functionally to the complementary cams 525 and 521 of the aforesaid patent, being employed to actuate the selection lock gateor bail through a cam follower plate 529 pivotally mounted on shaft 225. Again, only half of these cams is contoured to effect actuation of the gate, a dwell being employed to avoid useless actuation thereof during the restore phase of the program clutch.

The reverse control cam 50 (Figure 8) corresponds functionally to the complementary cams 550 and 551 of the aforesaid patent, being employed to effect setting of the actuator reversing unit described in said patent and to disconnect a link 514 (Figure 1) from an ear 515 for reasons explained hereinafter. This cam 50 is illustrated herein as a single'cam instead of as a pair of complementary cams, however, and a tension spring 51 is employed to hold the cam follower roller 52 in engagement with the cam. Again, however, only half of the cam 50 is contoured to effect actuation of the mechanisms controlled thereby, a dwell being employed to avoid useless actuation thereof during the restore phase of the program clutch.

The carriage dip cam, 53 (Figure 9) corresponds functionally not only to cam 514 of the aforesaid patent but also to cam 596 driven by the restore clutch in said patent. For this purpose it is contoured so as to effect clipping of the carriage during the setting phase of the program clutch, as did cam 514 of the aforesaid patent. At the conclusion of the setting phase, however, cam 53 holds the carriage dipped, and during the restore phase it is effective to control the rate of rise of the carriage, as did cam 598 of the aforesaid patent. These functions are performed through a follower 510 corresponding to the element of the same number in the aforesaid patent.

The actuator pawling cam 55 (Figure 10) is provided for actuating the pawls controlled by cam 514 through a cam follower 588 in the aforesaid patent. According to the present invention cam 55 is engaged by opposed rollers mounted on cam follower 5B8 pivotally mounted on shaft 225. This arrangement provides positive actuation of the follower 588. During the setting phase cam 55 rocks the follower so as to permit the actuator pawls to become disengaged from their respective gears as described in detail in the aforesaid patent, and during the restore phase cam 55 rocks follower 588 through the same connections to reengage all of said pawls with their associated gears.

The main clutch control cam 21 (Figure 2) corresponds functionally to the cam '14! of the aforesaid patent, being employed to actuate the main clutch control dog 16. The main clutch 25 corresponds to the clutch 428 of the aforesaid patent and is controlled by a dog 16 rockably mounted on a shaft fill and urged into contact with the main clutch by a spring 612 acting through a toggle linkage 610, 631.

A rocking lever 146 is journaled on-shaft 501 and carries a roller which is maintained in contact with cam 21 by a spring 146a. This rocking lever 146 carries an interponent 503 pivotally mounted thereon at 604 and urged clockwise with respect to lever 146 by a spring 613, movement between the lever and the interponent being limited by an ear 514 on interponent 503 which engages the lower edge of the lever 146. The interponent 603 is provided with a nose 615 adapted to engage a notch 616 on clutch dog 16 with a hooking action, so that movement of interponent 603 counter-clockwise about shaft 501 serves to rock dog 16 clockwise toward the end of the setting phase of operation of the program shaft, so as to effect engagement of the main clutch 25.

It will be noted, however, that cam 21 is provided with a dwell extending over the portion of its periphery which-is engaged by roller 145 during the restore phase of operation of the program clutch, so that no actuation of dog 16 is effected during that phase of operation.

Operation of the actuating mechanism, having been initiated as described above, proceeds until thelatch 832 (Figure 4) is tripped by any of the means described in the aforesaid patent. Latch 632 is fixed to a rockable shaft 826 and urged by 'a tension spring 633 into engagement with an ear 629 on clutch control dog l6, as described in said patent.

According to the present invention, means conditioned by the program clutch during its setting phase and responsive to movement of the clutch dog I6 in arresting operation of the actuating mechanism, are provided for the purpose of initiating'the restore phase of operation of the program clutch. For this purpose a restore phase initiating member 30 (Figure 1) is journaled on shaft 5M adjacent the program clutch control dog l0. A'spring 21, strong enough to overcome the dog spring 522 and to rock dog l against the tension of the latter spring, is tensioned between member 30 and the machine frame so as to cause said member to rock counter-clockwise whenever it is free to do so.

Early in the setting phase of the program shaft 20, the cam 50 (Figure 8) rocks the cam follower 49 clockwise and holds it in its clockwise position throughout the remaining part of the setting phase of the program clutch and throughout one or more subsequent cycles of the actuator clutch. Then during the restore phase of the shaft 20, the cam 50 drops off and allows the spring to return the cam follower to the position shown. This clockwise movement of the cam follower during the setting phase, causes counter-clockwise rocking of lever 520, described in said patent, which lever has a tongue 52i (Figure 1) adapted to disconnect link 5M from the ear 5I5 of the dog H], to permit unimpeded movement of the latter in accordance with the following description.

A cam 22 keyed to the program shaft 20 and engaged by a roller 28 on member 30 prevents counter-clockwise movement of said member until the setting phase of operation of the program clutch has advanced sufliciently to initiate operation of the main. clutch 25, at which stage the main clutch control dog will (unless operation of the main clutch has been selectively omitted as in certain division operations described in the aforesaid patent) stand rocked clockwise a sufficient distance to bring its face I! into blocking relationship with an ear 26 of member 30. Under such circumstancesithe dog [6 will prevent counter-clockwise movement of member 30 after cam 22 has released roller 28 and until the main clutch doglatch 632 (Figure 4) is tripped.

Upon tripping of the main clutch dog latch 632, the main clutch dog it will first be moved by spring (2 acting through toggle linkage SIB, 63i into contact with the periphery of clutch 25, still blocking member 30 from counter-clockwise ear 26 of member 30. At this time cam 22 will occupy a position diametrically opposite that in which it is shownin Figure 1, and member 30 will therefore be freed and will be rocked counterclockwise by its strong spring 21.

This counter-clockwise movement of member 30 is employed to initiate the restored phase of operation of the program clutch. The upper edge 29 of member 30 underlies a pin l2 on the program clutch control dog 10, so that upon counterclockwise movement, member 39 will carry with it the dog It), tensioning spring 522.

5 During the restore phase of operation thus initiated, all of the functions performed by the restore clutch of the aforesaid patent will be performed by the various devices actuated by clutch l5, and toward the end of the restore phase cam 22 will engage roller 28 rocking member 30 clockwise to permit spring 522 to effect disengagement of the program clutch at the conclusion of the restore phase, and retensioning spring 21.

If the operator wishes to initiate a division operation, he depresses the division key 919 (Figure 1), whereupon the roller 914 moves downwardly and out of the path of the division operating arm 915 and allows a strong spring 911 (Figure 5) to rock said operating arm toward the right. A

roller 919 (Figure I), mounted on the upper end of arm 915, engages the bar 593 as disclosed in said patent, and the setting phase of operation of the program clutch i5 is initiated as hereinbefore described. Operation of the program clutch 5 through its setting phase effects engagement of the actuator clutch, which reduces the dividend register by the amount of the divisor during each cycle thereof. Means are also provided which are operable by the program clutch during its setting phase for bringing certain of the automatic division controlling devices into operation in timed relation to one another so as to control disengagement of the actuator clutch at th correct ime.

5 This automatic division mechanism includes a sensing-comparing mechanism which continuously senses the numeral value of the dividend standing in the accumulator register during operation of the actuator clutch and compares this 40 value with the value of the divisor. The comparing mechanism effects disengagement of the actuator clutch as described fully in the aforesaid Avery patent, to which reference may be had for a detailed description of the comparing mechanism not specifically described herein. As far as the present invention is concerned, however, it is sufficient to understand that the levers I040 (Figure 3A) are positioned by cams 28l according to the values displayed by the respective dividend numeral wheels 219, and that the sensing lever carriers 9i3 are positioned in accordance with the values standing on the respective divisor numeral wheels M0.

Briefly, the position of each sensing lever carrier is determined by the following mechanism.

The segment arm i38 which positions the numeral wheel I40 is pivoted on a shaft I31 and positions a respective cam 9H pivotally mounted on shaft M2. The sensing lever carrier is freely 6O pivoted on the center BIG and has a stud 9l0 which is mounted on a lever pivoted to the carrier at 909 as described in said patent. The stud 9i0 cooperates with cam 9H and determines the position of the carrier on its pivotal center 9IB and value of the related dividend digit displayed on the numeral wheel 219, and that therefore the tip 905 (Figures 3 and 3A), forming a part of the sensing lever 900, is positioned in a manner determined by the comparative size of these two values. The tips 905 normally block the fingers 943 of a division control gate 901, which is spring urged clockwise about pivot 942. However, when the dividend numeral is reduced to approximately one-half the divisor numeral with which it is compared, the tip 906 (Figure 3) is raised upwardly above the respective finger 943. There is one sensing lever 900 in each order of the divisor register, but those in all orders to the right of the one which is associated with the highest or leftmost significant digit of the divisor are disabled by means described in said Avery patent. Therefore, when the order of the dividend in line with the leftmost order of the divisor is reduced to approximately one-half of the value of the digit standing in that order of the divisor, and all orders to the left thereof are reduced to zero, the tips 906 in all active sensing levers 900 are raised sufficiently to release the division control gate 901 and effect disengagement of the actuator clutch as will presently appear.

The sensing levers 900 are moved into sensing position and the division control gate is moved into cooperative relation with thesen sing levers by means corresponding to those described in the aforesaid patent, said means being operated by power derived from the program clutch during its setting phase; therefore, it is necessary to delay the movement of said division control gate into operation until the latter part of the setting phase, so as to insure that the. sensing levers 900 will be set before the division control ment of the shaft, roller IOI1 on lever IOI6 rides up the curved edge of lever 2I I6 out of restraining relationship therewith.

In order to ensure that the several sensing levers and their associated parts will have sufficient time to move into sensing position additional restraining means for the gate 901 are rendered effective before the lever IOI6 is removed from restraining relationship with the gate and are maintained effective until nearly the end of the setting phase. This additional restraining means comprises a delay latch 38 journaled on shaft 2| I9 and provided with an ear 39 engageable wlth the hook shaped end I024 of lever 2I IS. A cam 35 (Figure 3), keyed to shaft 20, lies in the plane of a roller 31 mounted on the delay latch 38. Shaft 20 rotates in the direction of the arrow, and early in the setting phase the roller 31. is released from the restraint of the high portion of said cam and the spring 34 is allowed to rock said delay latch clockwise until the lateral extension 39 is positioned in front of-hook I024 to restrain the movement thereof. After lever 2I I5 is thus latched, cam (Figure 8) rocks lever IOI6 counter-clockwise to inoperative position where it remains until the next setting phase. Near the end of the first setting phase, however, cam 36 (Figure 3) rocks the delay latch 38 counter-clockwise and releases the division gate 901 to allow fingers 943 to engage the tips 906 of the sensing levers 900.

When the controlling tips 906 are all rocked upwardly and out of the path of the fingers 943, as described hereinbefore, the spring 944 may rock the division control gate 901 clockwise about shaft 942 to effect disengagement of the actuator clutch as follows. Link 2 I I5 (Figure 3) connects levers 2H6 and 2II8, which through stud 2I20 and lever 2I22 rotate shaft 2I2I clockwise when the division gate 901 rocks clockwise. Also see cured to shaft 2I2I is a lever 2013 (Figure 4), which when rocked clockwise engages an ear 2I24 of the roller latch 632 and rocks said latch counter-clockwise. Roller 634 mounted thereon is thus removed from beneath ears B20 and allows the actuator clutch dog I6 (Figures 4 and 1) to be rocked counter-clockwise by the spring urged toggle 6I063I to effect disengagement of the actuator clutch at the end of the current cycle. The arrangement, as hereinbefore described, is such that when the actuator clutch is disengaged the program clutch is automatically engaged to rotate through its restore phase.

Means are provided to recock the division operating lever 915 during the restore phase. When the division key is depressed and the division operating lever 915 (Figure 5) rocks clockwise, the tip I021 thereon moves to the left, and

during the setting phase the cam 22 rotates and allows spring 35b to move link 35 to the right, rocking lever 841 clockwise about shaft 916 and latch I042 pivotally mounted thereon to the left. During this movement of latch I042, it rocks into operative relationship with the tip I021 in a manner completely described in the aforesaid patent.

During the restore phase of cam 22, the tip 3| rides from the low portion of cam 22 to the high portion thereof moving the link 35 to the left, and rocking lever 841 and latch I042 counter-clockwise about shaft 916, whereupon the latch I042 engages the tip I021 and rocks the division operating lever 915 counter-clockwise. The aforesaid patent explains in detail the means for latching the division operating arm 915 in its extreme counter-clockwise position until it is automatically released during a shifting operation or retained by stud 91.4 when the division key 910 rises.

Means are provided to restart the program clutch for a second setting phase, by the operation of a program shaft operated cam during its restore phase. When the division operating arm 915 is restored, as just described, an arm I054 (Figure 5) mounted thereon rocks a plus stroke bell crank in a manner described in said patent. On said plus stroke bell crank is an ear I056 (Figure 1), which overlies the bar 503, so that during this operation ear I056 moves downwardly and forces bar 503, triangular plate 505, link 5 I 4, downwardly to rock the program clutch control dog I0 counter-clockwise and engage the program clutch I5.

During the first part of this second setting phase of shaft 20 (Figure 5), the cam 22 releases link 35 and lever 42, shaft 2I2I, lever 2II8 (Figure 3) and link 2| I5 to allow spring 944 to rock gate 901 clockwise. If an overdraft has occurred during the previous actuating cycle, the dials to the left of the highest order dividend read 9 and the sensing levers 900 will be in the position shown in Figure 3 where they block the division gate 901. The operation will follow in sequence as before, with the actuator clutch 25 being engaged for a plus cycle as described in the aforeclutch to cause engagement of said main clutch,

said patent. During this setting hase it will be noted that the latch, I042 will be released from the tip I021 of the division operating member 915 freeing the latter for subsequent operation.

If no overdraft has occurred, however, the dials to the left of the highest order or the dividend read zero and the sensing levers 900 will have been rocked clockwise and out of the P th of tips 943. Since the lever IOI6 lies in its inoperative position, at this time, the division gate 901 may rock clockwise before the cam 36 (Figure 3) has rotated far enough to let the delay latch 38 into operation to block hook I024. When the division gate 901 rocks clockwise in this manner the shaft 2I2I is also rocked clockwise by link 2I I5, levers 2H8 and 2l22. Lever 2013 (Figure 4) is Provided with an upwardly extending arm 2013a which engages an ear 945 (Figure 2) of interponent 603, and rocks said interponent downwardly before cam 21 actuates cam follower I46. Thus the nose BIS does not hook the tip GIS and engagement of th actuator clutch is prevented.

Since the actuator clutch dog I6 is not rocked clockwise, in this case, the ear 26 (Figure 1) is not constrained and about the middle of the setting phase the cam 22 allows the spring 21 to rock lever 30 counterclockwise whereupon the edge 29 of the lever 30 engage stud I 2 and holds the program clutch dog I in its extreme counterclockwise or clutch'engaging position. Said dog therefore cannot disengage the program clutch at half revolution, and as a result it rotates from its setting phase into its restore phase without stopping. During the restore phase, however, the cam 22 returns to the position shown in Fieure 1,' where it rocks lever 30 clockwise to allow spring 522 to move dog I0 to disengage the clutch I at the end of the restor phase. During this restore phase the latch I042 passes above the tip I021 as illustrated in Figure 5.

The mechanism which automatically initiates a shifting operation after the second restore phase and releases the division operating lever 915, after said shifting operation, to start the machine operating in the next order is th same as disclosed in said patent.

In view of the description Of the complete machine disclosed in the aforesaid patent, the present description of an improvement thereof, will be understood as disclosin a complete machine embodying a simplified and improved means for controlling the machine, and although modification will occur at once to thos skilled in the art, the invention is not to be considered as restricted to the specific embodiment disclosed except as required by the spirit of the appending claims.

We claim:

In a motor driven calculating machine having actuating mechanism, a main clutch between said actuating mechanism and the motor and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase, control means'for .initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said control means, means deriving power from the motor for energizing said device, means for restraining said device inenergized condition during at least a portion of the setting phase of said program clutch, means operated by said program clutch for actuating the control member of said main and means controlled by said main clutch for restraining th aforesaid spring energized actuaing device during operation or the main clutch.

2. In a motor driven calculating machine having actuating mechanism, a main clutch between said actuating mechanism and the motor and a member movable" to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plu rality of phases including a setting phase, control means for initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said control means, means deriving power from the motor for energizing said device, means for restraining said devic in energized condition during at least a portion of the setting phase of said program clutch, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, and means comprisin the control member for said main clutch for restraining the spring energized actuating device.

3. In a motor driven calculating machine having actuating mechanism, a main clutch between said actuating mechanism and the motor and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said control means, means operated by said program clutch during its restore phase for energizing said actuating device, means controlled by said program clutch for restraining said device during at least a portion of the settin phase of said program clutch, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, and mean controlled by said main clutch for restraining the aforesaid sprin energized actuating device during operation of the main clutch.

4. In a motor driven calculating machine having actuating mechanism, a main clutch between said actuating mechanism and the motor and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, aspring energized actuating ing actuating mechanism, a main clutch between said actuating mechanism and the motor'and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase and a aforesaid restore phase, control means for initiating and terminating the phases of operation of said program clutch, a. spring energized actuating device for said control means, means operated by said program clutch during its restore phase for energizing said actuating device; said means being effective to restrain said device during at least a portion of the setting phase of said program clutch, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, and means controlled by said main clutch for. restraining the aforesaid spring energized actuatingv device during operation of the main clutch.

6. In a motor driven calculating machine having actuating mechanism, a main clutch between said actuating mechanism and the motor and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said control means, means operated by said program clutch during its restore phase for energizing said actuating device; said means being effective to restrain said device during at least a portion of the setting phase of said program clutch, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, and means comprising the control member for said main clutch for restraining the aforesaid spring energized actuating device.

'7. In a motor driven calculating machine having actuating mechanism, accumulating mechanism and means for moving said accumulating mechanism into and out of engagement with said actuating mechanism; the combination of a program clutch operable through a plurality of phases including a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, means controlled by said program clutch during the setting phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism into engagement with said actuating mechanism, and means controlled by said program clutch during the restore phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism out of engagement with said actuating mechanism.

8. In a motor driven calculating machine having actuating mechanism, accumulating mecha nism, means for moving said accumulating mechanism into and out of engagement with said actuating mechanism, a main clutch between the actuating mechanism and the motor, and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said control means, means deriving power from the motor for energizing said device, means for restraining said device in energized condition duringat least a portion of the setting phase of said program clutch, means controlled by said program clutch during the setting phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism into engagement with said actuating mechanism, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, means controlled by said main clutch for restraining the aforesaid spring energized actuating device during operation of the main clutch, and means controlled by said program clutch during the restore phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanisnr out of engagement with said actuating mechanism.

9. In a motor driven calculating machine having actuating mechanism, accumulating mechanism, means for moving said accumulating mechanism into and out of engagement with said actuating mechanism, a main clutch between the actuating mechanism and the motor, and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phases including a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said control means, means operated by said program clutch during its restore phase for energizing said actuating device, means controlled by said program clutch for restraining said device during at least a portion of the setting phase of saidprogram clutch, means controlled by said program clutch during the setting phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism intoengagement with said actuating mechanism, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, means controlled by said main clutch for restraining the aforesaid spring energized actuating device during operation of the main clutch, and means controlled by said program clutch during the restore phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism out of engagement with said actuating mechanism.

10. In a motor driven calculating machine having actuating mechanism, accumulating mechanism, means for moving said accumulating mechanism into and out of engagement with said actuating mechanism, a main clutch between the actuating mechanism and the motor, and a member movable to control the engagement and disengagement of said main clutch; the combination of a program clutch operable through a plurality of phasesincluding a setting phase and a restore phase, control means for initiating and terminating the phases of operation of said program clutch, a spring energized actuating device for said-control means, means operated by said program clutch during its restore phase for energizing said actuating device; said means being efiective to restrain said device during at least a portion of the setting phase of said program clutch, means controlled by said program clutch during the setting phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism into engagement with said actuating mechanism, means operated by said program clutch for actuating the control member of said main clutchto cause engagement of said main clutch, means controlled by said main clutch for restraining the aforesaid spring energized actuating device during operation of the main clutch, and means controlled by said program clutch during the restore phase thereof for causing said accumulating mechanism moving means to move said accumulating mechanism out of engagement with said actuating mechanism.

11.v A motor driven calculating machine having, in combination with calculating mechanism including a register, actuators therefor, and a clutch for driving said actuators; control mechanism including a. cyclic clutch operable through cycles each comprising a setting phase and a restore phase, means controlled bysaid cyclic clutch during its setting phase to set the calculatingmechanism in condition for operation and during its restore phase to normalizethe calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phase of said cyclic clutch, and means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch.

12. In a motor driven calculating machine having, in combination with calculating mechanism including a register, actuators therefor, a clutch for driving said actuators, and reverse mechanism between said clutch and said actuator for efiecting reverse rotation of said actuator; control mechanism including a cyclic clutch operable through cycles each comprising a setting phase and a restore phase, means controlled by said cyclic clutch during its setting phase to set the calculating mechanism in condition for operation and during its restore phase to normalize the calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phase of said cyclic clutch, means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch, and means controlled by said cyclic clutch during its setting phase for setting said reverse mechanism.

13. In a motor driven calculating machine having, in combination with calculating mechanism including mechanism for setting a selection into the machine, a register, actuators therefor, and a device for transferring the selection from said setting mechanism to said actuators; control mechanism including a cyclic clutch operable through cycles each comprising a setting phase and a restore phase, means controlled by said cyclic clutch during its setting phase to set the calculating mechanism in condition for operation and during its restore phase to normalize the calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phase of said cyclic clutch, means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch, and means controlled by said cyclic clutch during its setting phase to efiect operation of said transferring device.

14. In a motor driven calculating machine having, in combination with calculating mechanism including mechanism for setting a selection into the machine, a register, actuators therefor, and a device for transferring the selection from said setting mechanism to said actuators; control mechanism including a cyclic clutch operable through cycles each comprising a setting phase and a restore phase, means controlled by said cyclic clutch during its setting phase to set the calculating mechanism in condition for operation and during its restore phase to normalize the calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phase of said cyclic clutch, means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch, and means rendered effective by operation of said cyclic clutch during its setting phase to lock the selection in said actuators.

15. In a motor driven calculating machine having, in combination with calculating mechanism including a register, actuators therefor, an actuator clutch between said actuators and the motor, and mechanism for enmeshing said register with said actuators; control mechanism including a cyclic clutch operable through cycles each comprising a setting phase and a restore phase, means controlled by said cyclic clutch during its setting phase to set the calculating mechanism in condition for operation and during its restore phase to normalize the calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phase of said cyclic clutch, means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch, and means rendered effective by operation of said cyclic clutch during its setting phase to operate sai'd enmeshing mechanism.

16. In a motor driven calculating machine having, in combination with calculating mechanism including a register, actuators therefor, an actuator clutch between said actuators and the motor, and mechanism for locking said actuators in a centralized position; control mechanism including a cyclic clutch operable through cycles each comprising a setting phase and a restore phase, means controlled by said cyclic clutch during its setting phase to set the calculating mechanism in condition for operation, and during its restore phase to normalize the calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting. phase of said cyclic clutch, means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch, and means controlled by operation of said cyclic clutch during its setting phase torender said locking mechanism ineffective.

17. In a motor driven calculating machine having, in combination with calculating mechanism including a register, actuators therefor, an actuator clutch between said actuators and the motor, and mechanism for locking said actuators in a centralized position; means for rendering said locking mechanism inefiective, control mechanism including a cyclic clutch operable through cycles each comprising a settin phase and a restore phase, means controlled by said cyclic clutch during its setting phase to set th calcu-' lating mechanism in condition for operation, and during its restore phase to normalize the calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phas of said cyclic clutch, means controlled by said actuator clutch for initiating the restore phase of said cyclic clutch, and means controlled by operation of said cyclic clutch during its restore phase to render said locking mechanism efiective to lock said actuators.

18. In a motor driven calculating machine having, in combination with calculating mechanism including a register, actuators therefor, and a clutch for driving said actuators; a cyclic clutch operable through cycles each comprising a setting phase and'a restore phase, means controlled set the calculating mechanism in condition for operation and during its restore phase to normalize said calculating mechanism, and control keys for initiating operation of the machine; means controlled by said keys for initiating the setting phase of said cyclic clutch, and means controlled by said actuator clutch for initiating,

the restore phase of said cyclic clutch, mechanism operable by said cyclic clutch during its setting phase for efiecting engagement of said actuator clutch, and means controlled by said register for render ng said mechanism ineffective to engage said actuator clutch; said means for initiating the restore phase of said cyclic clutch being operable during the setting phase thereof upon operation of said last mentioned means.

19. In a motor driven calculating machine having actuating mechanism, a main clutch between said actuating mechanism and the motor and a member movable to control the engagement and disengagement of said main clutch; the combination of a cyclically operable program clutch, control means for causing engagement and disengagement of said program clutch, a spring energized actuating device for said control means operable to cause the same to eiiect engagement of said program clutch, means for restraining said devic in energized condition during at least a portion of each cycle of operation of said program clutch, means deriving power from the motor for energizing said device prior to restraint thereof by said restraining means, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, and means controlled by said main clutch for restraining the aforesaid spring energized actuating device during operation of the main clutch. 20. In a motor driven calculating machine having actuating mechanism, a main clutch beby said cyclic clutch during its setting phase to tween said actuating mechanism and the motor, and a member movable to control the engagement and disengagement of said main clutch; the combination of a cyclically operable program clutch, control means for causing engagement and disengagement of said program clutch, a spring energized actuating device for said control means operable to cause the same to effect engagement of said program clutch, means deriving power from the motor and operable during operation of said program clutch for energizing said device, means for restraining said device in energized condition during at least a portion of each cycle of operation of said program clutch, means operated by said program clutch for actuating the control member of said main clutch to cause engagement of said main clutch, and means comprising the control member for said main clutch for restraining the aforesaid spring energized actuating device.

21. In a motor driven calculating machine havin actuating mechanism, a main clutch between said actuating mechanism and the motor, a member movable to control the engagement and disengagement of said main clutch, a program clutch, and control means operable to cause engagement and disengagement of said program clutch; the combination of a sp g energized device for conditioning said control means to cause engagement of said program clutch, means operated by said program clutch for moving the control member of said main clutch to cause engagement of said main clutch, means operated by said program clutch for energizing said device, and means controlled by said main clutch during operation thereof for delaying operation of said spring energized device until substantially the end of the operation of said main clutch.

ROBERT E. BOYDEN. HAROLD T. AVERY. 

